This patch adds commands to access(open/close) and resize boot partitions on EMMC.
Signed-off-by: Amar amarendra.xt@samsung.com Acked-by: Simon Glass sjg@chromium.org --- Changes since V1: 1)Combined the common piece of code between 'open' and 'close' operations.
Changes since V2: 1)Updation of commit message and resubmition of proper patch set.
Changes since V3: No change.
Changes since V4: 1)Added a new funtion boot_part_access() to combine the common parts of 'mmc open' and 'mmc close' functionalities. 2)Used the generic function "mmc_boot_part_access()" instead of two functions "mmc_boot_open()" and "mmc_boot_close()". By doing so user can specify which boot partition to be accessed (opened / closed).
Changes since V5: 1)Updated minor nits in response to review comments.
Changes since V6: No change.
common/cmd_mmc.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 97 insertions(+), 1 deletion(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 7dacd51..5f2ae70 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -147,6 +147,31 @@ U_BOOT_CMD( "- display info of the current MMC device" );
+static int boot_part_access(struct mmc *mmc, u32 ack, u32 part_num, u32 access) +{ + int err; + err = mmc_boot_part_access(mmc, ack, part_num, access); + + if ((err == 0) && (access != 0)) { + printf("\t\t\t!!!Notice!!!\n"); + printf("!You must close EMMC boot Partition after all" + "images are written\n"); + printf("!EMMC boot partition has continuity at image" + "writing time.\n"); + printf("!So, do not close the boot partition before all" + "images are written.\n"); + return 0; + } else if ((err == 0) && (access == 0)) + return 0; + else if ((err != 0) && (access != 0)) { + printf("EMMC boot partition-%d OPEN Failed.\n", part_num); + return 1; + } else { + printf("EMMC boot partition-%d CLOSE Failed.\n", part_num); + return 1; + } +} + static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { enum mmc_state state; @@ -248,6 +273,71 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) curr_device, mmc->part_num);
return 0; + } else if ((strcmp(argv[1], "open") == 0) || + (strcmp(argv[1], "close") == 0)) { + int dev; + struct mmc *mmc; + u32 ack, part_num, access = 0; + + if (argc == 4) { + dev = simple_strtoul(argv[2], NULL, 10); + part_num = simple_strtoul(argv[3], NULL, 10); + } else + return CMD_RET_USAGE; + + mmc = find_mmc_device(dev); + if (!mmc) { + printf("no mmc device at slot %x\n", dev); + return 1; + } + + if (IS_SD(mmc)) { + printf("SD device cannot be opened/closed\n"); + return 1; + } + + if ((part_num <= 0) || (part_num > MMC_NUM_BOOT_PARTITION)) { + printf("Invalid boot partition number:\n"); + printf("Boot partition number cannot be <= 0\n"); + printf("EMMC44 supports only 2 boot partitions\n"); + return 1; + } + + if (strcmp(argv[1], "open") == 0) + access = part_num; /* enable R/W access to boot part*/ + if (strcmp(argv[1], "close") == 0) + access = 0; /* No access to boot partition */ + + /* acknowledge to be sent during boot operation */ + ack = 1; + return boot_part_access(mmc, ack, part_num, access); + + } else if (strcmp(argv[1], "bootpart") == 0) { + int dev; + dev = simple_strtoul(argv[2], NULL, 10); + + u32 bootsize = simple_strtoul(argv[3], NULL, 10); + u32 rpmbsize = simple_strtoul(argv[4], NULL, 10); + struct mmc *mmc = find_mmc_device(dev); + if (!mmc) { + printf("no mmc device at slot %x\n", dev); + return 1; + } + + if (IS_SD(mmc)) { + printf("It is not a EMMC device\n"); + return 1; + } + + if (0 == mmc_boot_partition_size_change(mmc, + bootsize, rpmbsize)) { + printf("EMMC boot partition Size %d MB\n", bootsize); + printf("EMMC RPMB partition Size %d MB\n", rpmbsize); + return 0; + } else { + printf("EMMC boot partition Size change Failed.\n"); + return 1; + } }
state = MMC_INVALID; @@ -317,5 +407,11 @@ U_BOOT_CMD( "mmc rescan\n" "mmc part - lists available partition on current mmc device\n" "mmc dev [dev] [part] - show or set current mmc device [partition]\n" - "mmc list - lists available devices"); + "mmc list - lists available devices\n" + "mmc open <dev> <boot_partition>\n" + " - Enable boot_part for booting and enable R/W access of boot_part\n" + "mmc close <dev> <boot_partition>\n" + " - Enable boot_part for booting and disable access to boot_part\n" + "mmc bootpart <device num> <boot part size MB> <RPMB part size MB>\n" + " - change sizes of boot and RPMB partions of specified device\n"); #endif